- Hewlett-Packard Plumbing Product User Manual
17
Combi HP thermostatic mixer shower
washer.
Make sure the inlet elbows are positioned the 
correct way. Offer the valve up to the mounting 
bracket and secure using the screws provided 
(fig.42).
Complete the pipework to the shower marking 
off the length to enter the elbows. Remove the 
valve and cut the pipes to length.
Flush pipework to clear the system of all 
debris and check for leaks. 
IMPORTANT: 
The inlet elbows contain check 
valves that may be damaged if debris is not 
flushed through prior to fitting. 
Where this is not possible refer to the 
‘flushing 
procedure’ on page 20.
Refit the valve to the mounting bracket and 
pipework. Tighten the inlet nuts and inlet elbow 
grub screws.
If fitting a fixed head, refer to the ‘Fitting the 
fixed head’ section and complete the outlet 
pipework to the fixed head position. 
Note: The outlet pipe for the fixed head should 
protrude from the surface of the wall between 
50 mm and 65 mm. Before fitting the fixed head 
to the wall, connect a hose to the pipework and 
direct to waste.
If fitting a riser rail kit refer to ‘Fitting the 
bulkhead’ and complete the outlet pipework. 
Before fitting the bulkhead to the wall, connect 
the shower hose and direct it to waste.
Open the isolating valves to the shower and 
flush through. Make sure the flow control 
is opened fully and the temperature control 
is rotated to ‘HOT’ and then to ‘COLD’ (if 
necessary depress the maximum temperature 
override button). Check for leaks and remedy if 
necessary.
Make good the wall surface and make sure 
the plastering/sealing is taken tight to the PVC 
shroud (fig.43). Should the shroud protrude 
beyond the wall surface, trim flush with a sharp 
knife (fig.34).
Offer the flush mount plate up to the finished 
surface. Make sure the valve and the plate are 
aligned and mark the ‘arrowed’ fixing holes 
(fig.35). Remove the flush mount plate then 
T00260
Fig.40
T00262
T00261
Fig.41
Fig.42










